Haldane's decompression model: Difference between revisions

Revision as of 14:47, 20 April 2020

Revision as of 06:43, 7 January 2021

Line 16:

'''Haldane's decompression model''' is a [[mathematical model]] for [[Decompression (diving)|decompression]] to sea level atmospheric pressure of divers breathing compressed air at ambient pressure that was proposed in 1908 by the Scottish physiologist, [[John Scott Haldane]] (2 May 1860 – 14/15 March 1936),<ref>[http://navxdivingu.blogspot.ae/2009/10/diving-history-john-scott-haldane.html "The United States Navy Experimental Diving Unit"]</ref> who was also famous for intrepid self-experimentation.

Haldane prepared the first recognized [[Decompression theory#John Scott Haldane|decompression table]] for the [[Admiralty|British Admiralty]] in 1908 based on extensive experiments on goats and other animals using a [[clinical endpoint]] of [[symptom]]atic [[decompression sickness]].

Haldane observed that goats, saturated to depths of {{convert|165|ft|m}} of sea water, did not develop [[decompression sickness]] (DCS) if subsequent [[Decompression (diving)|decompression]] was limited to half the ambient pressure. Haldane constructed schedules which limited the critical supersaturation ratio to "2", in five hypothetical body tissue compartments characterized by their halftime. Halftime is also termed [[Half-life]] when linked to [[Exponential decay|exponential processes]] such as [[radioactive decay]]. Haldane's five compartments (halftimes: 5, 10, 20, 40, 75 minutes) were used in decompression calculations and staged decompression procedures for fifty years. {{Citation needed|date=December 2019}}